Fig. 4

Cluster Analysis of Differential Metabolites. Clustering heat map of total differential metabolites (the upper frame is the grouped heat map, the lower frame is the sample heat map; each frame is the first picture is the positive ion mode, the second picture is the negative ion mode). The vertical direction is the clustering of samples, and the horizontal direction is the clustering of metabolites. The shorter the cluster branches, the higher the similarity. The relationship between the clustering of metabolite content between groups and samples can be seen through horizontal comparison. (“D” refer to Artemisia sieversiana. “Q” refer to Artemisia annua. “Z” refer to Artemisia wellbyi)